Control valve



Sept. 17, 1935. J. Auer-:R

. CONTROL VALVE original Filed 32111.12, 1932 Aun l Patented sept. 17, 193s UNITED STATES lPATENT OFFICE CONTROL vALvE l Joe Auger', Elk Lake, ontario, Canada.'

Appucaunn January 12, 1932, seal Nd. 586,213

. Renewed January 30, 1935 s claims. (o1.- 121-465) This invention relates to control valves and an object of the invention is to provide a valve operated from a single control which is applicable to various types of iiuid control devices such as that covered by my co-pending application Serial No.

525,223, the said valve being operable through a plurality of positions such as simultaneous pressure supply and exhaust, reverse and shut-ofi', with an automatically operated pressure valve to l0 control the exhaust in one phase of operation.

A further object of the invention is to provide a single control valve which is'operable to control a plurality of pressure medium conduits supplied from a single introductory conduit, with the inclusion `of an automatic pressure valve or exhaust in one phase, of Operation, thus taking the place of individual controls and a separate governor.

A still further object of the invention is to provide a valve of very simple character which will be inexpensive to manufacture.

With these and other objects in viewthe invention consists essentially of a valve casing carrying a rotary valve spindle formed with a pluvrality of passages therein extending in varied planes, adapted to alternately communicate with inlet and discharge passageways communicating with the valve casing,`one of said passageways exhausting directly to the atmosphere during one phase of operation, through the medium of an provision of a single conduit for introducing the pressure medium to the rotary valve, from which l it is supplied to the device to be operated, through valve connectingconduits, and accordingl to the manipulation of the rotary valve, as more fully described in the present specication and illustrated in the accompanying drawing which forms part of the same.

In the drawing, Figure 1 is a sectional elevation and the formation of the passageways through the valve spindle when the valve is in a position to normally feed the piston, showing the exhaust line in a .position to exhaust to the atmosphere through the pressure valve.

Figure 2 is a longitudinal section taken through the valve spindle on the line 2-2 of Figure 1, showing the position of the passageways therethrough When the spindle is turned to the opposite position to that illustrated in Figure l.

Figure 3 is a fragmentary plan view of the 'valve spindle and casing, illustrating the formal tion of the casing designed to control the operation of the pressure valve, the control lever being illustrated in dotted lines.

of the valve showing the position of the conduits Figure 4 is a diagrammatic view of the formation of the shoulder on the valve casing, illustrating the change in elevation of said shoulder to control the operation of the pressure valve, the position of the lever being illustrated in dotted 5 lines in conjunction with the shoulder, the corresponding position of the valve port being illustrated above each position of the lever.

Referring more particularly to the drawing, A indicates the valve as a whole, which includes the 10 casing I0 within which is mounted the rotary valve spindle I I provided with the lower pintle :I 2

extending through the casing and rotatably securing the spindle therein by means of a nut or other securing device I3. The spindle is operated l5 bymeans of the manual control I4, which is pref,- erably formed integral with the spindle. This provides for the manual rotation of the spindle.

In the side wallsof the casing I 0 orifices I5 and I6 are provided, said orices being diametrically 20 opposite each other, the orifice I5 being connected to conduit I1 and serving always as an exhaust outlet; the orice I6 being designed to receive the conduit I8 and serving alternatively as an intro,- ductory orifice or exhaust orifice according to the manipulation of the spindle II. A further orice i9 is provided in the upper end of the casing IIJ in substantially vertical alignment with -the oriilce I6. 'The orifice I9 is designed to receive the conduit 20 and to serve alternatively as an 30 exhaust orice or an introductory orifice according to the manipulation of the valve, The orices I6 and I9 in the casing I0 therefore serve a similar purpose.

In one side of the casing I0 a main Orice 2i Ais 35 provided `with which is connected the main pressure supply conduit 22. This serves for introducing the pressure medium to the valve through a single line from which it isA distributed to its proper discharge according to the manner in which the spindle is operated.

A main introductory passageway 23 is provided in the spindle which is bored transversely of the spindle and preferably terminates centrally of the spindle. Corresponding to this passageway 23 is 45- municates at a definite or central point with the main passageway 23 and auxiliary passageway 24.' Thepassageway 25 extendsat' an incline 55 .being parallel with the passageway 23.

downwardly from the passageways 23 and 24 and communicates with the exterior of the spindle at a level which corresponds with the orice I6, so that at one point during the operation of the spindle, the passageway 28 will directly register with the orifice I8. Similarly the pas` sageway 26 extends upwardly at an incline from the passageways 23 and 24 and communicates with the exterior of the spindle in an area at right angles to the passageway 25 and at a level corresponding with the position of the orifice I9, so that at one position in the operation of the spindle, the passageway 28 will communicate with the orice I9.

Below the passageway 24 a transverse passageway 21 is bored completely through the spindle so that it has an outlet on each side thereof. This passageway extends parallel to the passageway 24 and at right angles to the passageway 23. Thus, when passageway 24 is in register with the orifice 2| and the conduit 22, and the inclinedV passageway 26 is in register with the orice I9 and conduit 28, the passageway 21 will be in register with the orifices I8 and I8 and conduits I1 and I8, the valve thus assuming the position shown in Figure 2.

`In the upper part of the spindle a passageway 28 is provided corresponding to the passageway 21 but at right angles thereto, the passageway 28 The passageway 28 is bored at a level to register with the orifice I9 but instead of being bored completely through the spindle similarly to the passageway 21, the passageway 28 merely extends to the centre of the spindle where it communi- A cates with an upwardly disposed passageway 29, discharging to the atmosphere. 'I'he passageway 29 preferably extends into a part` of the control I 4.` and is enlarged in its upper area as at 38, being formed with a valve seat 3l upon which the pressure va1ve. 32 is designed to seat. I'his pressure valve and associated mechanism will be hereinafter more fully described.

The conduits I8 and 28 communicating with the casing I8 are designed to communicate at their other extremities with the opposite sides of .Y a cylinder 33 and to operate the piston 34 therein.

,The piston rod 35 is normally connected to some apparatus such as a rock drill, as described in my co-pending application referred to, and the control valve serves to control the operation of such a device.

In the position illustrated in Figure 1, the

, piston is starting its power stroke, pressure being supplied from the conduit 22 through the pas-- sageway 23, inclined passageway 28 and conduit 21 and exhaust conduit I1.

During the feeding operation it is very essential that the feed of the pressure medium be controlled and correspondingly that the pressure medium from the opposite side' of the piston be controlled. For instance, vwhen the apparatus is operating as a rock drill, it may be foundfthat the drill is feeding too rapidly, which will immediately cause pounding of the drill and consequently extreme vibration to the apparatus. It is necessary, therefore, that the feed of the pressure medium be lessened and that the exhaust of the pressure medium on the opposite side of the piston be properly controlled and this is taken care of through the operation of the spindle and the pressure valve 32. This valve is mounted on the pin 36 which also carries the coil spring 31. Loosely connected to the pin 36 is a control lever 38 which is mounted on the pin between the end thereof and the coil spring 31.

The lever 38 is mounted in a recess 39 formed in the spindle, being, pivoted to the lug 40 and projecting from` the spindle so that one end normally rests upon" the shoulder 4I of a recessed portion of the interior of the\ casing I0. The

depth of this recess is varied so that the shoulder therewith and its outer end will move along the of the lever 38, when it travels up the inclined portion 42 of the shoulder 4I, pivots on the lug 48 and the oposite end of the lever depresses the coil spring 31 and consequently presses the valve 32 more firmly on its seat 3|, thus slowing up the exhaust of the pressure medium from within the cylinder on one side of the piston and requiring a greater pressure for exhaust. This necessarily controls the power stroke of the piston and attached apparatus.

Similarly, when the spindle is moved further and the passageway 28 registers, for instance, only one-quarter of its area witl'nthehorifice I9, the lever 38 will be in a position illustrated as position III in Figure 4, thus placing more pressure upon the pressure valve 32. It follows, there-l fore, that when, during the turning movement of the spindle, the lever 38 reaches position IV illustrated in Figure 4, the passageway 28 will be closed and out of register with the orifice I 9.

Consequently, it will be realized that, as the valve spindle II is rotated from its normal feeding position illustratedin Figure 1 as the lever- 38 moves up the incline, it will depress the spring 31 to tighten the valve 32 on its seating as the passageway 28 gradually moves out of register with orifice I9. Likewise, when the valve spindle II is turned back to its normal feeding position as illustrated in Figure 1, as the passageway 29 comes gradually into register with the orifice I9, the lever 38 is sliding down the incline 42 and the pressure on the valve 32 .is gradually lessened until it is at a minimum when the port is wide open at the point where the passageway 28 completely registers with the orifice I 9.

The operation is briefly as follows. Assuming the spindle tobe in the position illustrated in Figure 1, the pressure medium is fed from the conduit 22 through passageways 23 and 25 in the `valve spindle and 'thence through conduit I8 to 'one end 0f the cylinder. This forces the piston 75 .inFigureslandz.

that by adjusting the operation of the device.

oforthescopeof forwardly in the cylinder and the pressure medium on the opposite side of the piston exhausts through conduit 20, passageways V28 and 29 and through valve 32 to the atmosphere, the exhaustig of the pressure medium being controlled in accordance with the position of the valve spindle, as previously explained, so that the forward movement of the piston may ,be very readily checked and moved forward at a very slow speed During this operation, the passageway 21 and the passageway 26 'are closed by the casing III. Upon reversing the valve spindle II, passageway 24 is brought into register with conduit 22, passageway 21 with the conduits I1 and I8, and sageway 26 with the conduit 20. Thepressure medium then feeds through conduit 22, passageways 24 and 26, conduit I9 to the cylinder, thus forcing the piston 34 backward in the cylinder 33, the pressure medium on the opposite side of the piston exhausting through conduit Il, passageway 21 and conduit' I1. During this phase of operation, no pressure control is acting upon the exhausting gases and the rearward movement of the piston is therefore of normal speed. During this phase of the operation the passageways 23 and 25 are closed by the casing Il. A

It is, therefore, readily apparent that I have provided a control valve mechanism which, through a' single control, will operate piston or like mechanism through a forward and rearward motion in which the speed of the piston when moving in one direction -is directly controlled automatically to a degree and it is further ,apparent pressure of the coil spring 31'any desired ratio 'of pressure in the exhaust line can be provided for. Y

The manual control I4 may be .applied in various ways, being formed integral if desired or detachable. The valve I2 is inserted in the upper area l of the passageway 29 and the lever 3l attached thereto after insertion, the connection being made in any suitable way. Thefconnection can be effected before the valve 32 is inserted, if the manual control is detachable or even if it is integral by merely enlarging the opening in the side of the manual control. The size ofthisopeninghasnomaterialbearingon the In forming the manual control integral the passageway 2S and enlargement 3l is eiected by boring through the end of lthe manual con Aas indicated in dotted lines Various modifications may be made in the ihjl vention without departing from the spirit therethe claims and, therefore, the exact forms shown are'to be taken as illustrative onlyandnotin alimitingsensaandldesire thatl onlysuchlim'itationsshallbeplacedthereonas al'eilnposed Aset forth in the appended claims.

.WhatIclaimas'myinventionim- LAoontrolvalvecomprisingacasingJvalvepleuresupplyandan valvevbeing providedv *increasingordecreadn'gthepremeofthevalve bythepriorartorarespecilly spindle insaid casing formed pair of' conduits with a .exhaust and a mesure valve in one of said exhaust pasagewavs designed tocontroltherateofdischargeof'the premiremediumfmm oneofsaid conduits, said with means for according to the operation otthespindle.

2. A, control valve comprising a casing, a'valve spindle in said casing formed with a plurality of pressure medium feeding and exhausting passageways therein, designed to simultaneously and ,alternately connect a pair of conduits with a pressure supply and an exhaust and a pressure valve in one of said exhaust passageways designed to control the rate of discharge of the exhausting pressure medium, from one of said conduits, said pressure valve being spring pressed and having l0 a lever connected thereto and means in connection with said control ,valve for acting upon said .lever to'increase or decrease the pressure of the pressure valve according to the operation of the spindle. j

3. A control valve comprising a casing, a spindle in said casing formed with a plurality of pressure medium feeding passageways extending in varied planes and centrally communicating with one another, said paageways being designed to alternately connect twol conduits with a pressure medium supply according to the operation of said spindle, exhaust passageways formed in said spindle adapted to communicate with said vconduits to permit them to exhaust according to the operation of said spindle and a pressure valve in one of said exhaust passageways designed to control the rate of discharge of the exhaust pressure medium from one of said conduits, one of said exhaust passageways communicating with .59 an exhaust conduit and the'other of said exhaust passageways communicating directly with the atmosphere through said pressure valve.

4,. A control valve comprising a casing, a valve spindle insaid casing formed with a plurality of 35 pressure medium feeding and exhausting'passageways therein, designed to simultaneously and alternately connecta pair of conduits with a pressure supply and an exhaust, a pressure valve in one of said exhaust ways designed to con- 40 trol the rate of discharge of the exhausting pressure medium, from one of said conduits, a pivoted lever having one end connected to said presume valve and the opposite end projecting lover and a shoulder formed on said casing, said shoulder being formed with an inclined portion designed to act upon said lever to increase or decreasethepressureofthevalveaccordingtothe direction of travel of the lever upon said shoulder valve casing,said shoulder extendingxin two.

Dlaesjoinedbyaninclinedsurfacasaidslnface servingtoactuponthelevertoincreaseordecreas'ethepresmnednthepresm'e'valveaccord- -ilmto the dh'ectiouofmovementof the control 'zo -Jon suona. 

